Hauv kev tsim cov tshuab nqus tsev- tsim foamed yas qhov chaw, bubbling yog ib tug nquag thiab rov zoo tsis xws luag, manifests li bulges thiab uneven npuas nyob rau saum npoo ntawm cov khoom, nrog rau hauv voids thiab pores. Qhov teeb meem no yooj yim ua rau batch tsis xws luag, tsis tsuas yog ua rau cov khoom zoo li thiab kev ntxhib los mos tab sis kuj impairing nws tag nrho cov qauv kev ua tau zoo. Nws yog qhov teeb meem tseem ceeb ntawm kev tsim khoom uas yuav tsum tau ua tib zoo tswj hauv cov txheej txheem nqus foaming.
Qhov ua rau bubbling hauv lub tshuab nqus tsev- tsim foamed yas qhov chaw tuaj yeem faib ua peb hom: raw khoom, txheej txheem, thiab khoom siv / pwm. Ntawm cov khoom siv raw, yog tias cov ntawv yas foamed khaws cia hauv qhov chaw ntub dej lossis tsis qhuav kom huv si, noo noo yuav vaporize thiab tsim npuas thaum lub sij hawm siab - kub molding. Ib txhij, impurities nyob rau hauv lub substrate, tsis tsim nyog proportions ntawm lub foaming masterbatch, los yog deterioration yuav ua rau txawv txawv gas ntau lawm, inducing bubbling. Nyob rau theem txheej txheem, cov cua kub ntau dhau los yog lub sijhawm cua sov ntev tuaj yeem ua rau thermal decomposition ntawm cov yas substrate, ua rau cov roj ntau dhau. Cov cua kub tsis sib xws thiab nrawm heev los yog qeeb lub tshuab nqus tsev rho tawm nrawm tuaj yeem tiv thaiv kom tsis txhob tshem tawm tag nrho cov huab cua ntawm daim ntawv thiab cov pwm, ntxiab roj hauv cov khoom thiab ua npuas. Nyob rau ntawm cov khoom siv thiab pwm, thaiv cov pwm vents thiab cov qauv tsis tsim nyog tuaj yeem ua rau cua ntxiab hauv pwm kab noj hniav; Cov khoom siv tsis zoo sealing thiab noo noo nkag mus rau hauv qhov chaw molding tuaj yeem ua rau blistering thiab bulging tsis xws luag nyob rau hauv lub npuas txheej.
Blistering tsis xws luag muaj ntau yam tsis zoo rau cov khoom thiab kev tsim khoom. Nyob rau hauv cov nqe lus ntawm tsos, npuas thiab bulges tshwm sim nyob rau hauv uneven nto thiab inconsistent gloss, ua tsis tau raws li cov qauv tsos thiab raug faib ncaj qha raws li qhov tsis xws luag. Hais txog kev ua tau zoo, cov pores sab hauv cuam tshuam qhov kev ncaj ncees ntawm cov qauv ua npuas ncauj, txo cov khoom toughness, compressive zog, thiab sealing kev ua tau zoo, ua rau nws nquag deformation thiab tawg thaum siv tom qab siv, shortening nws lifespan. Nyob rau tib lub sijhawm, cov teeb meem tshwm sim tsis tu ncua txo cov khoom tsim tawm, nce cov khoom pov tseg, rov ua dua, thiab cov nqi seem, cuam tshuam loj heev rau kev tsim khoom thiab cov txiaj ntsig kev lag luam.
Qhov teeb meem no tuaj yeem daws tau zoo los ntawm kev tswj hwm. Ua ntej, nruj me ntsis tswj cov khoom zoo, kom qhuav cov foamed boards ua ntej ntau lawm, nruj me ntsis tswj tus nqi ntawm cov ntaub ntawv siv, thiab xaiv cov ntaub ntawv tsim nyog thiab ruaj khov foaming raw khoom. Thib ob, ua kom zoo dua cov txheej txheem molding, ua kom raug cua sov thiab lub sijhawm kom tsis txhob muaj cov substrate decomposition thiab roj tsim, thiab phim tus nqi tsim nyog lub tshuab nqus tsev rho tawm kom ua tiav cov pa tshem tawm. Thaum kawg, kev saib xyuas tsis tu ncua ntawm cov khoom siv thiab pwm yog qhov tseem ceeb. Qhov no suav nrog kev tshem tawm cov vents, optimizing cov qauv tso pa, xyuas cov khoom siv sealing kev ua tau zoo, tiv thaiv cov dej noo infiltration thiab ntxiab cua hauv cov kab noj hniav, yog li daws qhov teeb meem foaming ntawm nws qhov chaw thiab ua kom cov khoom ruaj khov.